The Active Autowerke Mid Pipe for the BMW F80 M3 & F82/F83 M4 (S55) is a performance-focused exhaust upgrade that replaces the restrictive factory mid-section with a single, large-diameter pipe engineered for improved flow and throttle response. By eliminating the OEM crossover silencers and free-flowing the exhaust path, this mid pipe reduces backpressure, helps turbochargers spool quicker, and delivers a deeper, more harmonious exhaust tone that transforms the S55’s sound character — particularly when combined with an aftermarket rear exhaust.
Fits BMW F80 M3 and F82/F83 M4 with the S55 3.0 L twin-turbo engine.
Replaces the factory mid-section exhaust; retains connection points for stock or aftermarket rear components.
Best results when paired with an aftermarket rear exhaust system (e.g., Active Autowerke rear or other performance cat-back).
May require an off-road waiver from Active Autowerke for shipment/installation (company policy).
Active Autowerke mid pipe assembly engineered for optimal fitment and clearance.
Integrated Active F-brace for added underbody rigidity and precise mounting.
Mounting hardware and installation instructions.
Pipe Diameter: ~3.5″ oval main section designed for less restriction and improved exhaust flow.
Material: Precision TIG-welded stainless steel for strength and corrosion resistance.
Fitment: Direct bolt-on mid section; retains OEM flanges and connects with stock or aftermarket rear sections.
Weight: Lighter than stock mid pipe, contributing to reduced mass and quicker response.
Installation: Bolt-on; no cutting or welding required using OEM exhaust hangers and couplers.
Less restrictive exhaust flow reduces backpressure and enhances turbo efficiency.
Quicker turbo spool and improved throttle response versus stock mid pipe.
Deeper, richer exhaust tone that eliminates the high-pitched “weed-eater” sound common to stock S55 mid sections.
Lighter than OEM mid pipe for slight weight savings and performance feel.
Precision fitment ensures smooth integration with factory hangers and rear exhaust components.
Single-pipe design simplifies flow dynamics and improves exhaust scavenging.
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